Nothing ensures the module exists while we're iterating mod->jump_entries in __jump_label_mod_text_reserved(), take a module reference to ensure the module sticks around.
Signed-off-by: Peter Zijlstra (Intel) <pet...@infradead.org> Reviewed-by: Steven Rostedt (VMware) <rost...@goodmis.org> --- kernel/jump_label.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) --- a/kernel/jump_label.c +++ b/kernel/jump_label.c @@ -539,19 +539,25 @@ static void static_key_set_mod(struct st static int __jump_label_mod_text_reserved(void *start, void *end) { struct module *mod; + int ret; preempt_disable(); mod = __module_text_address((unsigned long)start); WARN_ON_ONCE(__module_text_address((unsigned long)end) != mod); + if (!try_module_get(mod)) + mod = NULL; preempt_enable(); if (!mod) return 0; - - return __jump_label_text_reserved(mod->jump_entries, + ret = __jump_label_text_reserved(mod->jump_entries, mod->jump_entries + mod->num_jump_entries, start, end); + + module_put(mod); + + return ret; } static void __jump_label_mod_update(struct static_key *key)